# Searching for Stars Closely Encountering with the Solar System Based on Data from the Gaia DR1 and RAVE5 Catalogues

## TL;DR

This study identifies stars that have or will closely encounter the Solar System within 2 parsecs using Gaia DR1 and RAVE5 data, highlighting GJ 710 as the closest known future approach.

## Contribution

First to analyze Gaia DR1 and RAVE5 data for stars with potential close encounters with the Solar System, identifying key candidates including GJ 710.

## Key findings

- GJ 710 will approach within approximately 0.063 pc in about 1.385 million years.
- Several stars may have encountered or will encounter within 1 pc of the Solar System.
- Identification of candidate stars with potential close encounters based on astrometric data.

## Abstract

We have searched for the stars that either encountered in the past or will encounter in the future with the Solar system closer than 2 pc. For this purpose, we took more than 216 000 stars with the measured proper motions and trigonometric parallaxes from the Gaia DR1 catalogue and their radial velocities from the RAVE5 catalogue. We have found several stars for which encounters closer than 1 pc are possible. The star GJ 710, for which the minimum distance is d_m=0.063+/-0.044 pc at time t_m=1385+/-52 thousand years, is the record-holder among them. Two more stars, TYC 8088-631-1 and TYC 6528-980-1, whose encounter parameters, however, are estimated with large errors, are of interest.